/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.support.v4.database;
import android.text.TextUtils;
/**
* Helper for accessing features in {@link android.database.DatabaseUtils}
* introduced after API level 4 in a backwards compatible fashion.
*/
public class DatabaseUtilsCompat {
private DatabaseUtilsCompat() {
/* Hide constructor */
}
/**
* Concatenates two SQL WHERE clauses, handling empty or null values.
*/
public static String concatenateWhere(String a, String b) {
if (TextUtils.isEmpty(a)) {
return b;
}
if (TextUtils.isEmpty(b)) {
return a;
}
return "(" + a + ") AND (" + b + ")";
}
/**
* Appends one set of selection args to another. This is useful when adding a selection
* argument to a user provided set.
*/
public static String[] appendSelectionArgs(String[] originalValues, String[] newValues) {
if (originalValues == null || originalValues.length == 0) {
return newValues;
}
String[] result = new String[originalValues.length + newValues.length ];
System.arraycopy(originalValues, 0, result, 0, originalValues.length);
System.arraycopy(newValues, 0, result, originalValues.length, newValues.length);
return result;
}
}